As an amateur textual critic, I've become very interested in the early translations of the New Testament, and I found this page listing a number of critical editions of NT translations.

At least in the case of the Coptic (either Sahidic or Bohairic), is there a newer critical apparatus (in the style of the Nestle-Aland text or the United Bible Society text) available for purchase? So far, I've only found reprints of the Horner work, which while a good starting place, is 11 volumes long between the Sahidic (7) and Bohairic (4) editions.

(At the very least, Amazon did not have a newer critical text, though it did have newer editions of the NT available by J. Warren Wells which were not critical texts.)